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Ryujinx/ARMeilleure/CodeGen/X86/Assembler.cs
LDj3SNuD eefe2b20fc Fix Fcmge_S/V & Fcmgt_S/V Inst.s (#815) 
* Fix Fcmge_S/V & Fcmgt_S/V.

Follow-up Fcm**_S/V & Fc*mp*_S.
Improve CmpCondition enum.
Nits.

* Optimize Fccmp*_S & Fcmp*_S.

* Fix cvtsd2si opcode.

* Address PR feedback.
2019-11-09 23:21:03 -03:00

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using ARMeilleure.IntermediateRepresentation;
using System;
using System.Diagnostics;
using System.IO;
namespace ARMeilleure.CodeGen.X86
{
class Assembler
{
private const int BadOp = 0;
private const int OpModRMBits = 24;
private const byte RexPrefix = 0x40;
private const byte RexWPrefix = 0x48;
private const byte LockPrefix = 0xf0;
[Flags]
private enum InstructionFlags
{
None = 0,
RegOnly = 1 << 0,
Reg8Src = 1 << 1,
Reg8Dest = 1 << 2,
RexW = 1 << 3,
Vex = 1 << 4,
PrefixBit = 16,
PrefixMask = 3 << PrefixBit,
Prefix66 = 1 << PrefixBit,
PrefixF3 = 2 << PrefixBit,
PrefixF2 = 3 << PrefixBit
}
private struct InstructionInfo
{
public int OpRMR { get; }
public int OpRMImm8 { get; }
public int OpRMImm32 { get; }
public int OpRImm64 { get; }
public int OpRRM { get; }
public InstructionFlags Flags { get; }
public InstructionInfo(
int opRMR,
int opRMImm8,
int opRMImm32,
int opRImm64,
int opRRM,
InstructionFlags flags)
{
OpRMR = opRMR;
OpRMImm8 = opRMImm8;
OpRMImm32 = opRMImm32;
OpRImm64 = opRImm64;
OpRRM = opRRM;
Flags = flags;
}
}
private static InstructionInfo[] _instTable;
private Stream _stream;
static Assembler()
{
_instTable = new InstructionInfo[(int)X86Instruction.Count];
// Name RM/R RM/I8 RM/I32 R/I64 R/RM Flags
Add(X86Instruction.Add, new InstructionInfo(0x00000001, 0x00000083, 0x00000081, BadOp, 0x00000003, InstructionFlags.None));
Add(X86Instruction.Addpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f58, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Addps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f58, InstructionFlags.Vex));
Add(X86Instruction.Addsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f58, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Addss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f58, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.And, new InstructionInfo(0x00000021, 0x04000083, 0x04000081, BadOp, 0x00000023, InstructionFlags.None));
Add(X86Instruction.Andnpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f55, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Andnps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f55, InstructionFlags.Vex));
Add(X86Instruction.Bsr, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fbd, InstructionFlags.None));
Add(X86Instruction.Bswap, new InstructionInfo(0x00000fc8, BadOp, BadOp, BadOp, BadOp, InstructionFlags.RegOnly));
Add(X86Instruction.Call, new InstructionInfo(0x020000ff, BadOp, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Cmovcc, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f40, InstructionFlags.None));
Add(X86Instruction.Cmp, new InstructionInfo(0x00000039, 0x07000083, 0x07000081, BadOp, 0x0000003b, InstructionFlags.None));
Add(X86Instruction.Cmppd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc2, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Cmpps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc2, InstructionFlags.Vex));
Add(X86Instruction.Cmpsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc2, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Cmpss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc2, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Cmpxchg16b, new InstructionInfo(0x01000fc7, BadOp, BadOp, BadOp, BadOp, InstructionFlags.RexW));
Add(X86Instruction.Comisd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2f, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Comiss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2f, InstructionFlags.Vex));
Add(X86Instruction.Cpuid, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fa2, InstructionFlags.RegOnly));
Add(X86Instruction.Cvtdq2pd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fe6, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Cvtdq2ps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5b, InstructionFlags.Vex));
Add(X86Instruction.Cvtpd2dq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fe6, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Cvtpd2ps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5a, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Cvtps2dq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5b, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Cvtps2pd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5a, InstructionFlags.Vex));
Add(X86Instruction.Cvtsd2si, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2d, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Cvtsd2ss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5a, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Cvtsi2sd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2a, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Cvtsi2ss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2a, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Cvtss2sd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5a, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Div, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x060000f7, InstructionFlags.None));
Add(X86Instruction.Divpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5e, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Divps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5e, InstructionFlags.Vex));
Add(X86Instruction.Divsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5e, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Divss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5e, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Haddpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f7c, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Haddps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f7c, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Idiv, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x070000f7, InstructionFlags.None));
Add(X86Instruction.Imul, new InstructionInfo(BadOp, 0x0000006b, 0x00000069, BadOp, 0x00000faf, InstructionFlags.None));
Add(X86Instruction.Imul128, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x050000f7, InstructionFlags.None));
Add(X86Instruction.Insertps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a21, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Lea, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x0000008d, InstructionFlags.None));
Add(X86Instruction.Maxpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5f, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Maxps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5f, InstructionFlags.Vex));
Add(X86Instruction.Maxsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5f, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Maxss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5f, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Minpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5d, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Minps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5d, InstructionFlags.Vex));
Add(X86Instruction.Minsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5d, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Minss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5d, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Mov, new InstructionInfo(0x00000089, BadOp, 0x000000c7, 0x000000b8, 0x0000008b, InstructionFlags.None));
Add(X86Instruction.Mov16, new InstructionInfo(0x00000089, BadOp, 0x000000c7, BadOp, 0x0000008b, InstructionFlags.Prefix66));
Add(X86Instruction.Mov8, new InstructionInfo(0x00000088, 0x000000c6, BadOp, BadOp, 0x0000008a, InstructionFlags.Reg8Src | InstructionFlags.Reg8Dest));
Add(X86Instruction.Movd, new InstructionInfo(0x00000f7e, BadOp, BadOp, BadOp, 0x00000f6e, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Movdqu, new InstructionInfo(0x00000f7f, BadOp, BadOp, BadOp, 0x00000f6f, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Movhlps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f12, InstructionFlags.Vex));
Add(X86Instruction.Movlhps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f16, InstructionFlags.Vex));
Add(X86Instruction.Movq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f7e, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Movsd, new InstructionInfo(0x00000f11, BadOp, BadOp, BadOp, 0x00000f10, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Movss, new InstructionInfo(0x00000f11, BadOp, BadOp, BadOp, 0x00000f10, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Movsx16, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fbf, InstructionFlags.None));
Add(X86Instruction.Movsx32, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000063, InstructionFlags.None));
Add(X86Instruction.Movsx8, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fbe, InstructionFlags.Reg8Src));
Add(X86Instruction.Movzx16, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fb7, InstructionFlags.None));
Add(X86Instruction.Movzx8, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fb6, InstructionFlags.Reg8Src));
Add(X86Instruction.Mul128, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x040000f7, InstructionFlags.None));
Add(X86Instruction.Mulpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f59, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Mulps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f59, InstructionFlags.Vex));
Add(X86Instruction.Mulsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f59, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Mulss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f59, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Neg, new InstructionInfo(0x030000f7, BadOp, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Not, new InstructionInfo(0x020000f7, BadOp, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Or, new InstructionInfo(0x00000009, 0x01000083, 0x01000081, BadOp, 0x0000000b, InstructionFlags.None));
Add(X86Instruction.Paddb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ffc, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Paddd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ffe, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Paddq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fd4, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Paddw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ffd, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pand, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fdb, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pandn, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fdf, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pavgb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fe0, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pavgw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fe3, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pblendvb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3810, InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpeqb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f74, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpeqd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f76, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpeqq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3829, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpeqw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f75, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpgtb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f64, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpgtd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f66, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpgtq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3837, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pcmpgtw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f65, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pextrb, new InstructionInfo(0x000f3a14, BadOp, BadOp, BadOp, BadOp, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pextrd, new InstructionInfo(0x000f3a16, BadOp, BadOp, BadOp, BadOp, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pextrq, new InstructionInfo(0x000f3a16, BadOp, BadOp, BadOp, BadOp, InstructionFlags.Vex | InstructionFlags.RexW | InstructionFlags.Prefix66));
Add(X86Instruction.Pextrw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc5, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pinsrb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a20, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pinsrd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a22, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pinsrq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a22, InstructionFlags.Vex | InstructionFlags.RexW | InstructionFlags.Prefix66));
Add(X86Instruction.Pinsrw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc4, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmaxsb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f383c, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmaxsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f383d, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmaxsw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fee, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmaxub, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fde, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmaxud, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f383f, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmaxuw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f383e, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pminsb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3838, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pminsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3839, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pminsw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fea, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pminub, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fda, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pminud, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f383b, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pminuw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f383a, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmovsxbw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3820, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmovsxdq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3825, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmovsxwd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3823, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmovzxbw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3830, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmovzxdq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3835, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmovzxwd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3833, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmulld, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3840, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pmullw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fd5, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pop, new InstructionInfo(0x0000008f, BadOp, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Popcnt, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fb8, InstructionFlags.PrefixF3));
Add(X86Instruction.Por, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000feb, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pshufb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3800, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pshufd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f70, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pslld, new InstructionInfo(BadOp, 0x06000f72, BadOp, BadOp, 0x00000ff2, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Pslldq, new InstructionInfo(BadOp, 0x07000f73, BadOp, BadOp, BadOp, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psllq, new InstructionInfo(BadOp, 0x06000f73, BadOp, BadOp, 0x00000ff3, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psllw, new InstructionInfo(BadOp, 0x06000f71, BadOp, BadOp, 0x00000ff1, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psrad, new InstructionInfo(BadOp, 0x04000f72, BadOp, BadOp, 0x00000fe2, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psraw, new InstructionInfo(BadOp, 0x04000f71, BadOp, BadOp, 0x00000fe1, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psrld, new InstructionInfo(BadOp, 0x02000f72, BadOp, BadOp, 0x00000fd2, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psrlq, new InstructionInfo(BadOp, 0x02000f73, BadOp, BadOp, 0x00000fd3, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psrldq, new InstructionInfo(BadOp, 0x03000f73, BadOp, BadOp, BadOp, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psrlw, new InstructionInfo(BadOp, 0x02000f71, BadOp, BadOp, 0x00000fd1, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psubb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ff8, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psubd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ffa, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psubq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ffb, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Psubw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000ff9, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpckhbw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f68, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpckhdq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f6a, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpckhqdq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f6d, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpckhwd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f69, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpcklbw, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f60, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpckldq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f62, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpcklqdq, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f6c, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Punpcklwd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f61, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Push, new InstructionInfo(BadOp, 0x0000006a, 0x00000068, BadOp, 0x060000ff, InstructionFlags.None));
Add(X86Instruction.Pxor, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fef, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Rcpps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f53, InstructionFlags.Vex));
Add(X86Instruction.Rcpss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f53, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Ror, new InstructionInfo(0x010000d3, 0x010000c1, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Roundpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a09, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Roundps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a08, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Roundsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a0b, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Roundss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a0a, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Rsqrtps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f52, InstructionFlags.Vex));
Add(X86Instruction.Rsqrtss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f52, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Sar, new InstructionInfo(0x070000d3, 0x070000c1, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Setcc, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f90, InstructionFlags.Reg8Dest));
Add(X86Instruction.Shl, new InstructionInfo(0x040000d3, 0x040000c1, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Shr, new InstructionInfo(0x050000d3, 0x050000c1, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Shufpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc6, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Shufps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc6, InstructionFlags.Vex));
Add(X86Instruction.Sqrtpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f51, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Sqrtps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f51, InstructionFlags.Vex));
Add(X86Instruction.Sqrtsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f51, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Sqrtss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f51, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Sub, new InstructionInfo(0x00000029, 0x05000083, 0x05000081, BadOp, 0x0000002b, InstructionFlags.None));
Add(X86Instruction.Subpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5c, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Subps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5c, InstructionFlags.Vex));
Add(X86Instruction.Subsd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5c, InstructionFlags.Vex | InstructionFlags.PrefixF2));
Add(X86Instruction.Subss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f5c, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Test, new InstructionInfo(0x00000085, BadOp, 0x000000f7, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Unpckhpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f15, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Unpckhps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f15, InstructionFlags.Vex));
Add(X86Instruction.Unpcklpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f14, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Unpcklps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f14, InstructionFlags.Vex));
Add(X86Instruction.Vpblendvb, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x000f3a4c, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Xor, new InstructionInfo(0x00000031, 0x06000083, 0x06000081, BadOp, 0x00000033, InstructionFlags.None));
Add(X86Instruction.Xorpd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f57, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Xorps, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f57, InstructionFlags.Vex));
}
private static void Add(X86Instruction inst, InstructionInfo info)
{
_instTable[(int)inst] = info;
}
public Assembler(Stream stream)
{
_stream = stream;
}
public void Add(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Add);
}
public void Addsd(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Addsd);
}
public void Addss(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Addss);
}
public void And(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.And);
}
public void Bsr(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Bsr);
}
public void Bswap(Operand dest)
{
WriteInstruction(dest, null, dest.Type, X86Instruction.Bswap);
}
public void Call(Operand dest)
{
WriteInstruction(dest, null, OperandType.None, X86Instruction.Call);
}
public void Cdq()
{
WriteByte(0x99);
}
public void Cmovcc(Operand dest, Operand source, OperandType type, X86Condition condition)
{
InstructionInfo info = _instTable[(int)X86Instruction.Cmovcc];
WriteOpCode(dest, null, source, type, info.Flags, info.OpRRM | (int)condition, rrm: true);
}
public void Cmp(Operand src1, Operand src2, OperandType type)
{
WriteInstruction(src1, src2, type, X86Instruction.Cmp);
}
public void Cqo()
{
WriteByte(0x48);
WriteByte(0x99);
}
public void Cmpxchg16b(MemoryOperand memOp)
{
WriteByte(LockPrefix);
WriteInstruction(memOp, null, OperandType.None, X86Instruction.Cmpxchg16b);
}
public void Comisd(Operand src1, Operand src2)
{
WriteInstruction(src1, null, src2, X86Instruction.Comisd);
}
public void Comiss(Operand src1, Operand src2)
{
WriteInstruction(src1, null, src2, X86Instruction.Comiss);
}
public void Cpuid()
{
WriteInstruction(null, null, OperandType.None, X86Instruction.Cpuid);
}
public void Cvtsd2ss(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Cvtsd2ss);
}
public void Cvtsi2sd(Operand dest, Operand src1, Operand src2, OperandType type)
{
WriteInstruction(dest, src1, src2, X86Instruction.Cvtsi2sd, type);
}
public void Cvtsi2ss(Operand dest, Operand src1, Operand src2, OperandType type)
{
WriteInstruction(dest, src1, src2, X86Instruction.Cvtsi2ss, type);
}
public void Cvtss2sd(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Cvtss2sd);
}
public void Div(Operand source)
{
WriteInstruction(null, source, source.Type, X86Instruction.Div);
}
public void Divsd(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Divsd);
}
public void Divss(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Divss);
}
public void Idiv(Operand source)
{
WriteInstruction(null, source, source.Type, X86Instruction.Idiv);
}
public void Imul(Operand source)
{
WriteInstruction(null, source, source.Type, X86Instruction.Imul128);
}
public void Imul(Operand dest, Operand source, OperandType type)
{
if (source.Kind != OperandKind.Register)
{
throw new ArgumentException($"Invalid source operand kind \"{source.Kind}\".");
}
WriteInstruction(dest, source, type, X86Instruction.Imul);
}
public void Imul(Operand dest, Operand src1, Operand src2, OperandType type)
{
InstructionInfo info = _instTable[(int)X86Instruction.Imul];
if (src2.Kind != OperandKind.Constant)
{
throw new ArgumentException($"Invalid source 2 operand kind \"{src2.Kind}\".");
}
if (IsImm8(src2.Value, src2.Type) && info.OpRMImm8 != BadOp)
{
WriteOpCode(dest, null, src1, type, info.Flags, info.OpRMImm8, rrm: true);
WriteByte(src2.AsByte());
}
else if (IsImm32(src2.Value, src2.Type) && info.OpRMImm32 != BadOp)
{
WriteOpCode(dest, null, src1, type, info.Flags, info.OpRMImm32, rrm: true);
WriteInt32(src2.AsInt32());
}
else
{
throw new ArgumentException($"Failed to encode constant 0x{src2.Value:X}.");
}
}
public void Insertps(Operand dest, Operand src1, Operand src2, byte imm)
{
WriteInstruction(dest, src1, src2, X86Instruction.Insertps);
WriteByte(imm);
}
public void Jcc(X86Condition condition, long offset)
{
if (ConstFitsOnS8(offset))
{
WriteByte((byte)(0x70 | (int)condition));
WriteByte((byte)offset);
}
else if (ConstFitsOnS32(offset))
{
WriteByte(0x0f);
WriteByte((byte)(0x80 | (int)condition));
WriteInt32((int)offset);
}
else
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
}
public void Jmp(long offset)
{
if (ConstFitsOnS8(offset))
{
WriteByte(0xeb);
WriteByte((byte)offset);
}
else if (ConstFitsOnS32(offset))
{
WriteByte(0xe9);
WriteInt32((int)offset);
}
else
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
}
public void Lea(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Lea);
}
public void Mov(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Mov);
}
public void Mov16(Operand dest, Operand source)
{
WriteInstruction(dest, source, OperandType.None, X86Instruction.Mov16);
}
public void Mov8(Operand dest, Operand source)
{
WriteInstruction(dest, source, OperandType.None, X86Instruction.Mov8);
}
public void Movd(Operand dest, Operand source)
{
InstructionInfo info = _instTable[(int)X86Instruction.Movd];
if (source.Type.IsInteger() || source.Kind == OperandKind.Memory)
{
WriteOpCode(dest, null, source, OperandType.None, info.Flags, info.OpRRM, rrm: true);
}
else
{
WriteOpCode(dest, null, source, OperandType.None, info.Flags, info.OpRMR);
}
}
public void Movdqu(Operand dest, Operand source)
{
WriteInstruction(dest, null, source, X86Instruction.Movdqu);
}
public void Movhlps(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Movhlps);
}
public void Movlhps(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Movlhps);
}
public void Movq(Operand dest, Operand source)
{
InstructionInfo info = _instTable[(int)X86Instruction.Movd];
InstructionFlags flags = info.Flags | InstructionFlags.RexW;
if (source.Type.IsInteger() || source.Kind == OperandKind.Memory)
{
WriteOpCode(dest, null, source, OperandType.None, flags, info.OpRRM, rrm: true);
}
else if (dest.Type.IsInteger() || dest.Kind == OperandKind.Memory)
{
WriteOpCode(dest, null, source, OperandType.None, flags, info.OpRMR);
}
else
{
WriteInstruction(dest, source, OperandType.None, X86Instruction.Movq);
}
}
public void Movsd(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Movsd);
}
public void Movss(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Movss);
}
public void Movsx16(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Movsx16);
}
public void Movsx32(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Movsx32);
}
public void Movsx8(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Movsx8);
}
public void Movzx16(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Movzx16);
}
public void Movzx8(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Movzx8);
}
public void Mul(Operand source)
{
WriteInstruction(null, source, source.Type, X86Instruction.Mul128);
}
public void Mulsd(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Mulsd);
}
public void Mulss(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Mulss);
}
public void Neg(Operand dest)
{
WriteInstruction(dest, null, dest.Type, X86Instruction.Neg);
}
public void Not(Operand dest)
{
WriteInstruction(dest, null, dest.Type, X86Instruction.Not);
}
public void Or(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Or);
}
public void Pcmpeqw(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Pcmpeqw);
}
public void Pextrb(Operand dest, Operand source, byte imm)
{
WriteInstruction(dest, null, source, X86Instruction.Pextrb);
WriteByte(imm);
}
public void Pextrd(Operand dest, Operand source, byte imm)
{
WriteInstruction(dest, null, source, X86Instruction.Pextrd);
WriteByte(imm);
}
public void Pextrq(Operand dest, Operand source, byte imm)
{
WriteInstruction(dest, null, source, X86Instruction.Pextrq);
WriteByte(imm);
}
public void Pextrw(Operand dest, Operand source, byte imm)
{
WriteInstruction(dest, null, source, X86Instruction.Pextrw);
WriteByte(imm);
}
public void Pinsrb(Operand dest, Operand src1, Operand src2, byte imm)
{
WriteInstruction(dest, src1, src2, X86Instruction.Pinsrb);
WriteByte(imm);
}
public void Pinsrd(Operand dest, Operand src1, Operand src2, byte imm)
{
WriteInstruction(dest, src1, src2, X86Instruction.Pinsrd);
WriteByte(imm);
}
public void Pinsrq(Operand dest, Operand src1, Operand src2, byte imm)
{
WriteInstruction(dest, src1, src2, X86Instruction.Pinsrq);
WriteByte(imm);
}
public void Pinsrw(Operand dest, Operand src1, Operand src2, byte imm)
{
WriteInstruction(dest, src1, src2, X86Instruction.Pinsrw);
WriteByte(imm);
}
public void Pop(Operand dest)
{
if (dest.Kind == OperandKind.Register)
{
WriteCompactInst(dest, 0x58);
}
else
{
WriteInstruction(dest, null, dest.Type, X86Instruction.Pop);
}
}
public void Popcnt(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Popcnt);
}
public void Pshufd(Operand dest, Operand source, byte imm)
{
WriteInstruction(dest, null, source, X86Instruction.Pshufd);
WriteByte(imm);
}
public void Push(Operand source)
{
if (source.Kind == OperandKind.Register)
{
WriteCompactInst(source, 0x50);
}
else
{
WriteInstruction(null, source, source.Type, X86Instruction.Push);
}
}
public void Return()
{
WriteByte(0xc3);
}
public void Ror(Operand dest, Operand source, OperandType type)
{
WriteShiftInst(dest, source, type, X86Instruction.Ror);
}
public void Sar(Operand dest, Operand source, OperandType type)
{
WriteShiftInst(dest, source, type, X86Instruction.Sar);
}
public void Shl(Operand dest, Operand source, OperandType type)
{
WriteShiftInst(dest, source, type, X86Instruction.Shl);
}
public void Shr(Operand dest, Operand source, OperandType type)
{
WriteShiftInst(dest, source, type, X86Instruction.Shr);
}
public void Setcc(Operand dest, X86Condition condition)
{
InstructionInfo info = _instTable[(int)X86Instruction.Setcc];
WriteOpCode(dest, null, null, OperandType.None, info.Flags, info.OpRRM | (int)condition);
}
public void Sub(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Sub);
}
public void Subsd(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Subsd);
}
public void Subss(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Subss);
}
public void Test(Operand src1, Operand src2, OperandType type)
{
WriteInstruction(src1, src2, type, X86Instruction.Test);
}
public void Xor(Operand dest, Operand source, OperandType type)
{
WriteInstruction(dest, source, type, X86Instruction.Xor);
}
public void Xorps(Operand dest, Operand src1, Operand src2)
{
WriteInstruction(dest, src1, src2, X86Instruction.Xorps);
}
public void WriteInstruction(
X86Instruction inst,
Operand dest,
Operand source,
OperandType type = OperandType.None)
{
WriteInstruction(dest, null, source, inst, type);
}
public void WriteInstruction(X86Instruction inst, Operand dest, Operand src1, Operand src2)
{
if (src2.Kind == OperandKind.Constant)
{
WriteInstruction(src1, dest, src2, inst);
}
else
{
WriteInstruction(dest, src1, src2, inst);
}
}
public void WriteInstruction(X86Instruction inst, Operand dest, Operand source, byte imm)
{
WriteInstruction(dest, null, source, inst);
WriteByte(imm);
}
public void WriteInstruction(
X86Instruction inst,
Operand dest,
Operand src1,
Operand src2,
Operand src3)
{
// 3+ operands can only be encoded with the VEX encoding scheme.
Debug.Assert(HardwareCapabilities.SupportsVexEncoding);
WriteInstruction(dest, src1, src2, inst);
WriteByte((byte)(src3.AsByte() << 4));
}
public void WriteInstruction(
X86Instruction inst,
Operand dest,
Operand src1,
Operand src2,
byte imm)
{
WriteInstruction(dest, src1, src2, inst);
WriteByte(imm);
}
private void WriteShiftInst(Operand dest, Operand source, OperandType type, X86Instruction inst)
{
if (source.Kind == OperandKind.Register)
{
X86Register shiftReg = (X86Register)source.GetRegister().Index;
if (shiftReg != X86Register.Rcx)
{
throw new ArgumentException($"Invalid shift register \"{shiftReg}\".");
}
source = null;
}
WriteInstruction(dest, source, type, inst);
}
private void WriteInstruction(Operand dest, Operand source, OperandType type, X86Instruction inst)
{
InstructionInfo info = _instTable[(int)inst];
if (source != null)
{
if (source.Kind == OperandKind.Constant)
{
ulong imm = source.Value;
if (inst == X86Instruction.Mov8)
{
WriteOpCode(dest, null, null, type, info.Flags, info.OpRMImm8);
WriteByte((byte)imm);
}
else if (inst == X86Instruction.Mov16)
{
WriteOpCode(dest, null, null, type, info.Flags, info.OpRMImm32);
WriteInt16((short)imm);
}
else if (IsImm8(imm, type) && info.OpRMImm8 != BadOp)
{
WriteOpCode(dest, null, null, type, info.Flags, info.OpRMImm8);
WriteByte((byte)imm);
}
else if (IsImm32(imm, type) && info.OpRMImm32 != BadOp)
{
WriteOpCode(dest, null, null, type, info.Flags, info.OpRMImm32);
WriteInt32((int)imm);
}
else if (dest != null && dest.Kind == OperandKind.Register && info.OpRImm64 != BadOp)
{
int rexPrefix = GetRexPrefix(dest, source, type, rrm: false);
if (rexPrefix != 0)
{
WriteByte((byte)rexPrefix);
}
WriteByte((byte)(info.OpRImm64 + (dest.GetRegister().Index & 0b111)));
WriteUInt64(imm);
}
else
{
throw new ArgumentException($"Failed to encode constant 0x{imm:X}.");
}
}
else if (source.Kind == OperandKind.Register && info.OpRMR != BadOp)
{
WriteOpCode(dest, null, source, type, info.Flags, info.OpRMR);
}
else if (info.OpRRM != BadOp)
{
WriteOpCode(dest, null, source, type, info.Flags, info.OpRRM, rrm: true);
}
else
{
throw new ArgumentException($"Invalid source operand kind \"{source.Kind}\".");
}
}
else if (info.OpRRM != BadOp)
{
WriteOpCode(dest, null, source, type, info.Flags, info.OpRRM, rrm: true);
}
else if (info.OpRMR != BadOp)
{
WriteOpCode(dest, null, source, type, info.Flags, info.OpRMR);
}
else
{
throw new ArgumentNullException(nameof(source));
}
}
private void WriteInstruction(
Operand dest,
Operand src1,
Operand src2,
X86Instruction inst,
OperandType type = OperandType.None)
{
InstructionInfo info = _instTable[(int)inst];
if (src2 != null)
{
if (src2.Kind == OperandKind.Constant)
{
ulong imm = src2.Value;
if ((byte)imm == imm && info.OpRMImm8 != BadOp)
{
WriteOpCode(dest, src1, null, type, info.Flags, info.OpRMImm8);
WriteByte((byte)imm);
}
else
{
throw new ArgumentException($"Failed to encode constant 0x{imm:X}.");
}
}
else if (src2.Kind == OperandKind.Register && info.OpRMR != BadOp)
{
WriteOpCode(dest, src1, src2, type, info.Flags, info.OpRMR);
}
else if (info.OpRRM != BadOp)
{
WriteOpCode(dest, src1, src2, type, info.Flags, info.OpRRM, rrm: true);
}
else
{
throw new ArgumentException($"Invalid source operand kind \"{src2.Kind}\".");
}
}
else if (info.OpRRM != BadOp)
{
WriteOpCode(dest, src1, src2, type, info.Flags, info.OpRRM, rrm: true);
}
else if (info.OpRMR != BadOp)
{
WriteOpCode(dest, src1, src2, type, info.Flags, info.OpRMR);
}
else
{
throw new ArgumentNullException(nameof(src2));
}
}
private void WriteOpCode(
Operand dest,
Operand src1,
Operand src2,
OperandType type,
InstructionFlags flags,
int opCode,
bool rrm = false)
{
int rexPrefix = GetRexPrefix(dest, src2, type, rrm);
if ((flags & InstructionFlags.RexW) != 0)
{
rexPrefix |= RexWPrefix;
}
int modRM = (opCode >> OpModRMBits) << 3;
MemoryOperand memOp = null;
if (dest != null)
{
if (dest.Kind == OperandKind.Register)
{
int regIndex = dest.GetRegister().Index;
modRM |= (regIndex & 0b111) << (rrm ? 3 : 0);
if ((flags & InstructionFlags.Reg8Dest) != 0 && regIndex >= 4)
{
rexPrefix |= RexPrefix;
}
}
else if (dest.Kind == OperandKind.Memory)
{
memOp = dest as MemoryOperand;
}
else
{
throw new ArgumentException("Invalid destination operand kind \"" + dest.Kind + "\".");
}
}
if (src2 != null)
{
if (src2.Kind == OperandKind.Register)
{
int regIndex = src2.GetRegister().Index;
modRM |= (regIndex & 0b111) << (rrm ? 0 : 3);
if ((flags & InstructionFlags.Reg8Src) != 0 && regIndex >= 4)
{
rexPrefix |= RexPrefix;
}
}
else if (src2.Kind == OperandKind.Memory && memOp == null)
{
memOp = src2 as MemoryOperand;
}
else
{
throw new ArgumentException("Invalid source operand kind \"" + src2.Kind + "\".");
}
}
bool needsSibByte = false;
bool needsDisplacement = false;
int sib = 0;
if (memOp != null)
{
// Either source or destination is a memory operand.
Register baseReg = memOp.BaseAddress.GetRegister();
X86Register baseRegLow = (X86Register)(baseReg.Index & 0b111);
needsSibByte = memOp.Index != null || baseRegLow == X86Register.Rsp;
needsDisplacement = memOp.Displacement != 0 || baseRegLow == X86Register.Rbp;
if (needsDisplacement)
{
if (ConstFitsOnS8(memOp.Displacement))
{
modRM |= 0x40;
}
else /* if (ConstFitsOnS32(memOp.Displacement)) */
{
modRM |= 0x80;
}
}
if (baseReg.Index >= 8)
{
rexPrefix |= RexPrefix | (baseReg.Index >> 3);
}
if (needsSibByte)
{
sib = (int)baseRegLow;
if (memOp.Index != null)
{
int indexReg = memOp.Index.GetRegister().Index;
if (indexReg == (int)X86Register.Rsp)
{
throw new ArgumentException("Using RSP as index register on the memory operand is not allowed.");
}
if (indexReg >= 8)
{
rexPrefix |= RexPrefix | (indexReg >> 3) << 1;
}
sib |= (indexReg & 0b111) << 3;
}
else
{
sib |= 0b100 << 3;
}
sib |= (int)memOp.Scale << 6;
modRM |= 0b100;
}
else
{
modRM |= (int)baseRegLow;
}
}
else
{
// Source and destination are registers.
modRM |= 0xc0;
}
Debug.Assert(opCode != BadOp, "Invalid opcode value.");
if ((flags & InstructionFlags.Vex) != 0 && HardwareCapabilities.SupportsVexEncoding)
{
int vexByte2 = (int)(flags & InstructionFlags.PrefixMask) >> (int)InstructionFlags.PrefixBit;
if (src1 != null)
{
vexByte2 |= (src1.GetRegister().Index ^ 0xf) << 3;
}
else
{
vexByte2 |= 0b1111 << 3;
}
ushort opCodeHigh = (ushort)(opCode >> 8);
if ((rexPrefix & 0b1011) == 0 && opCodeHigh == 0xf)
{
// Two-byte form.
WriteByte(0xc5);
vexByte2 |= (~rexPrefix & 4) << 5;
WriteByte((byte)vexByte2);
}
else
{
// Three-byte form.
WriteByte(0xc4);
int vexByte1 = (~rexPrefix & 7) << 5;
switch (opCodeHigh)
{
case 0xf: vexByte1 |= 1; break;
case 0xf38: vexByte1 |= 2; break;
case 0xf3a: vexByte1 |= 3; break;
default: Debug.Assert(false, $"Failed to VEX encode opcode 0x{opCode:X}."); break;
}
vexByte2 |= (rexPrefix & 8) << 4;
WriteByte((byte)vexByte1);
WriteByte((byte)vexByte2);
}
opCode &= 0xff;
}
else
{
switch (flags & InstructionFlags.PrefixMask)
{
case InstructionFlags.Prefix66: WriteByte(0x66); break;
case InstructionFlags.PrefixF2: WriteByte(0xf2); break;
case InstructionFlags.PrefixF3: WriteByte(0xf3); break;
}
if (rexPrefix != 0)
{
WriteByte((byte)rexPrefix);
}
}
if (dest != null && (flags & InstructionFlags.RegOnly) != 0)
{
opCode += dest.GetRegister().Index & 7;
}
if ((opCode & 0xff0000) != 0)
{
WriteByte((byte)(opCode >> 16));
}
if ((opCode & 0xff00) != 0)
{
WriteByte((byte)(opCode >> 8));
}
WriteByte((byte)opCode);
if ((flags & InstructionFlags.RegOnly) == 0)
{
WriteByte((byte)modRM);
if (needsSibByte)
{
WriteByte((byte)sib);
}
if (needsDisplacement)
{
if (ConstFitsOnS8(memOp.Displacement))
{
WriteByte((byte)memOp.Displacement);
}
else /* if (ConstFitsOnS32(memOp.Displacement)) */
{
WriteInt32(memOp.Displacement);
}
}
}
}
private void WriteCompactInst(Operand operand, int opCode)
{
int regIndex = operand.GetRegister().Index;
if (regIndex >= 8)
{
WriteByte(0x41);
}
WriteByte((byte)(opCode + (regIndex & 0b111)));
}
private static int GetRexPrefix(Operand dest, Operand source, OperandType type, bool rrm)
{
int rexPrefix = 0;
if (Is64Bits(type))
{
rexPrefix = RexWPrefix;
}
void SetRegisterHighBit(Register reg, int bit)
{
if (reg.Index >= 8)
{
rexPrefix |= RexPrefix | (reg.Index >> 3) << bit;
}
}
if (dest != null && dest.Kind == OperandKind.Register)
{
SetRegisterHighBit(dest.GetRegister(), rrm ? 2 : 0);
}
if (source != null && source.Kind == OperandKind.Register)
{
SetRegisterHighBit(source.GetRegister(), rrm ? 0 : 2);
}
return rexPrefix;
}
private static bool Is64Bits(OperandType type)
{
return type == OperandType.I64 || type == OperandType.FP64;
}
private static bool IsImm8(ulong immediate, OperandType type)
{
long value = type == OperandType.I32 ? (int)immediate : (long)immediate;
return ConstFitsOnS8(value);
}
private static bool IsImm32(ulong immediate, OperandType type)
{
long value = type == OperandType.I32 ? (int)immediate : (long)immediate;
return ConstFitsOnS32(value);
}
public static int GetJccLength(long offset)
{
if (ConstFitsOnS8(offset < 0 ? offset - 2 : offset))
{
return 2;
}
else if (ConstFitsOnS32(offset < 0 ? offset - 6 : offset))
{
return 6;
}
else
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
}
public static int GetJmpLength(long offset)
{
if (ConstFitsOnS8(offset < 0 ? offset - 2 : offset))
{
return 2;
}
else if (ConstFitsOnS32(offset < 0 ? offset - 5 : offset))
{
return 5;
}
else
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
}
private static bool ConstFitsOnS8(long value)
{
return value == (sbyte)value;
}
private static bool ConstFitsOnS32(long value)
{
return value == (int)value;
}
private void WriteInt16(short value)
{
WriteUInt16((ushort)value);
}
private void WriteInt32(int value)
{
WriteUInt32((uint)value);
}
private void WriteByte(byte value)
{
_stream.WriteByte(value);
}
private void WriteUInt16(ushort value)
{
_stream.WriteByte((byte)(value >> 0));
_stream.WriteByte((byte)(value >> 8));
}
private void WriteUInt32(uint value)
{
_stream.WriteByte((byte)(value >> 0));
_stream.WriteByte((byte)(value >> 8));
_stream.WriteByte((byte)(value >> 16));
_stream.WriteByte((byte)(value >> 24));
}
private void WriteUInt64(ulong value)
{
_stream.WriteByte((byte)(value >> 0));
_stream.WriteByte((byte)(value >> 8));
_stream.WriteByte((byte)(value >> 16));
_stream.WriteByte((byte)(value >> 24));
_stream.WriteByte((byte)(value >> 32));
_stream.WriteByte((byte)(value >> 40));
_stream.WriteByte((byte)(value >> 48));
_stream.WriteByte((byte)(value >> 56));
}
}
}
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